December in Cheyenne averages a daily high of 4.3°C with nights around -7.7°C. Expect roughly 5.8 wet days totalling 11.9mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Cheyenne is June.
Based on CHEYENNE WSFO AIRPORT, WY US (1.8km), 1995–2024. 30 years of December data.